__must_check       16 include/linux/compiler-gcc3.h #define __must_check		__attribute__((warn_unused_result))
__must_check       13 include/linux/compiler-gcc4.h #define __must_check 		__attribute__((warn_unused_result))
__must_check        6 include/linux/compiler-gcc5.h #define __must_check			__attribute__((warn_unused_result))
__must_check      211 include/linux/compiler.h #define __must_check
__must_check      215 include/linux/compiler.h #undef __must_check
__must_check      216 include/linux/compiler.h #define __must_check